10% Vitamin C Self-Activating
The ZO Skin Health 10% Vitamin C Self-Activating is a serums, essence, ampoule. Our analysis of its 12 ingredients (7 low-risk) rates it Excellent (84/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.
The ZO Skin Health 10% Vitamin C Self-Activating is a serums, essence, ampoule. Our analysis of its 12 ingredients (7 low-risk) rates it Excellent (84/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Cyclopentasiloxane
(Hair Conditioning, Skin Conditioning, Emollient, Solvent) |
Silicone
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Dimethicone Crosspolymer
(Emulsion Stabilising, Hair Fixing, Suspending Agent Nonsurfactant, Viscosity Increasingagent Nonaqueous, Viscosity Controlling) |
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ASCORBIC ACID
(Antioxidant, Buffering, Fragrance, Skin Conditioning) |
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
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Citrus Aurantium Amara Peel Oil
(Skin Conditioning) |
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Squalane
(Emollient, Hair Conditioning, Refatting, Skin Conditioning) |
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Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning) |
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
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Ubiquinone
(Antioxidant, Skin Conditioning) |
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Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
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Citral
(Flavoring Agent, Fragrance, Masking) |
Allergens
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.
EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
The concentrations these actives are typically effective at in research — not a measurement of this product.
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
ASCORBIC ACID, Tetrahexyldecyl Ascorbate
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
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